What payment gateways do most BTC websites and marketplaces use? My main concern is to find out how does every transaction to and from a marketplace get mixed like the service of bitcoinfog, how is an escrow system built and how does on almost every BTC marketplace, the deposit address is always different?

FYI: I'm a web dev. who has 0 knowledge in project developments related to BTC and look forward to learn more.

I guess not sure. I always thought the BTC Mixing between transactions on Blockchain was money laundering???

Not the smartest around here 

I need a Bitcoins Web Developer who can either code for me or sell me the idea on how to implement a escrow system, have a new BTC address for deposits every time and a BTC mixing script for a website.

Shoot me a message on BTCTalk to discuss further.

I am looking forward to add a escrow system to my website which also kinda mixes the transactions so it is hard to detect. Any right directions you can point me to please?

Example of function:

Buyer sends money to deposit address provided on the website
Money gets sent to websites wallet or escrow account
Money can be later withdrawed by someone else.

Something in between that which can mix up the transactions so it is hard to track would be appreciated.

Yea, but i'm just looking to buy 2$ of capt coin to hold off. I have done trades on localbitcoin and stellartalk.org.

I only have 2$ on paypal lol, I would like to buy 2$ worth for capt coin. Not going first, besides who'd want to scam 2$ lol.